package com.nny;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

public class Test {
    public static void main(String[] args) {

    }

    public static class Test3 {
        public static void main(String[] args) throws IOException {
            String date="祝你生日快乐";
            FileOutputStream outputStream = new FileOutputStream("2.txt");
            byte[] bytes = date.getBytes();
            outputStream.write(bytes);


            FileInputStream inputStream = new FileInputStream("2.txt");
            byte [] buffer = new byte[1024];
            StringBuilder conten=new StringBuilder();
            int length;
            while ((length = inputStream.read(buffer))!=-1){
                conten.append(new String(buffer,0,length, StandardCharsets.UTF_8));
            }
            System.out.println(conten.toString());
        }
    }
}
